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drm/rockchip/dsi: fix handling mipi_dsi_pixel_format_to_bpp result

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The function can return negative value so it should be assigned to signed
variable.

The problem has been detected using patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Chris Zhong <zyw@rock-chips.com>
This commit is contained in:
Andrzej Hajda 2016-01-14 09:59:02 +01:00 committed by Mark Yao
parent c7647f8681
commit 484bb6c969
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/rockchip/dw-mipi-dsi.c
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@ -461,10 +461,11 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi)
{
unsigned int bpp, i, pre;
unsigned int i, pre;
unsigned long mpclk, pllref, tmp;
unsigned int m = 1, n = 1, target_mbps = 1000;
unsigned int max_mbps = dptdin_map[ARRAY_SIZE(dptdin_map) - 1].max_mbps;
int bpp;
bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
if (bpp < 0) {